Erberich Stephan G, Panigrahy Ashok, Friedlich Philippe, Seri Istvan, Nelson Marvin D, Gilles Floyd
Department of Radiology, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, 4560 Sunset Blvd., Los Angeles, CA 90027, USA.
Neuroimage. 2006 Jan 1;29(1):155-61. doi: 10.1016/j.neuroimage.2005.07.024. Epub 2005 Aug 19.
Since the onset and early postnatal development of hemispheric lateralization in the human brain are unknown, we studied cortical activation induced by passive extension and flexion of the hand in neonates using functional magnetic resonance imaging (fMRI). In contrast to that seen in older age groups, somatosensory areas in the pre- and postcentral gyri of the neonate showed no significant hemispheric lateralization at term. Instead, our findings from independent left- and right-hand experiments suggest the presence of an emerging trend of contralateral lateralization of the somatosensory system at around term.
由于人类大脑半球侧化的起始和出生后早期发育尚不清楚，我们使用功能磁共振成像（fMRI）研究了新生儿手部被动伸展和弯曲所诱发的皮质激活。与年龄较大的群体不同，足月新生儿中央前回和中央后回的体感区域未显示出明显的半球侧化。相反，我们从独立的左手和右手实验中得出的结果表明，在足月左右时体感系统存在对侧侧化的新出现趋势。
